banleng

Hello guy greeting from Thailand I'm a newbie this site and this is my first post.
I own 2005 LS430 with 93k mile
There is a noise and vibration when the AC on
Follow this link

- I replace new compressor, dryer clean system but noise still exists
- Noise and vibration not come from compressor side

Anybody has the same issue? Please help.

lextout

get a stethoscope and put it on the engine components and listen for noise, maybe its some bearings in the alternator

ls430w140

Which compressor brand did you end up installing in LS430? Do you recall if you saw any of the DTC malfunction codes starting with B14 before or after?

banleng

Thank. I will try this.

banleng

Compressor brand DENSO 6SEU16C.
Connect Techstream no fault code .
I have an appointment with mechanic this weekend and I will update your guy.

banleng

solved : noise come from power steering pump

Htony

A/C being on and power steering pump becomes noisy? Interesting. Belt tension checked?

banleng

It might get some load from AC compressor
I use a long screwdriver to listen any component (alternator,pulley,compressor,belt tensioner,steering pump) to localizing the area that the noise is coming from.
When I touch to Steering pump it vibrate. I listen noise from side of the screwdriver handle the noise is exactly same in cabin.